From 18adfad01bd939b388313c83c0465c84c11febac Mon Sep 17 00:00:00 2001
From: Torsten Sommer <torsten.sommer@3ds.com>
Date: Tue, 21 May 2024 10:35:06 +0200
Subject: [PATCH] Add --version option (#506)

---
 build/build.py        | 28 ++++++++++++++++++++++++++++
 fmusim/CMakeLists.txt |  6 ++++--
 fmusim/fmusim.c       | 12 ++++++++++--
 3 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/build/build.py b/build/build.py
index 9b2de884..02760f9c 100644
--- a/build/build.py
+++ b/build/build.py
@@ -24,6 +24,27 @@
 args, _ = parser.parse_known_args()
 
 
+def get_version():
+    try:
+        cwd = os.path.dirname(__file__)
+
+        changed_files = subprocess.check_output(['git', 'status', '--porcelain', '--untracked=no'],
+                                                cwd=cwd).decode('ascii').strip()
+
+        if changed_files:
+            return None
+
+        version = subprocess.check_output(['git', 'tag', '--contains'], cwd=cwd).decode('ascii').strip()
+
+        if not version:
+            version = subprocess.check_output(['git', 'rev-parse', '--short', 'HEAD'], cwd=cwd).decode(
+                'ascii').strip()
+
+        return version
+    except:
+        return None
+
+
 def build_fmus(fmi_version, fmi_type=None):
 
     if fmi_type is not None:
@@ -38,6 +59,13 @@ def build_fmus(fmi_version, fmi_type=None):
 
     cmake_args = []
 
+    version = get_version()
+
+    if not version:
+        version = 'development build'
+
+    cmake_args += ['-D', f'FMUSIM_VERSION="{version}"']
+
     fmi_platform = args.platform
     fmi_architecture, fmi_system = fmi_platform.split('-')
 
diff --git a/fmusim/CMakeLists.txt b/fmusim/CMakeLists.txt
index 615c3f20..78d78dc2 100644
--- a/fmusim/CMakeLists.txt
+++ b/fmusim/CMakeLists.txt
@@ -10,6 +10,8 @@ else ()
     set(FMI_PLATFORM "${FMI_ARCHITECTURE}-linux")
 endif ()
 
+set(FMUSIM_VERSION "" CACHE STRING "")
+
 set(CVODE_DIR    ${CMAKE_SOURCE_DIR}/build/cvode-${FMI_PLATFORM}/install/)
 set(LIBXML2_DIR  ${CMAKE_SOURCE_DIR}/build/libxml2-${FMI_PLATFORM}/install/)
 set(ZLIB_DIR     ${CMAKE_SOURCE_DIR}/build/zlib-${FMI_PLATFORM}/install/)
@@ -94,9 +96,9 @@ target_include_directories(fmusim PRIVATE
 )
 
 if (WIN32)
-    target_compile_definitions(fmusim PRIVATE YY_NO_UNISTD_H LIBXML_STATIC)
+    target_compile_definitions(fmusim PRIVATE FMUSIM_VERSION=${FMUSIM_VERSION} YY_NO_UNISTD_H LIBXML_STATIC)
 else ()
-    target_compile_definitions(fmusim PRIVATE LIBXML_STATIC)
+    target_compile_definitions(fmusim PRIVATE FMUSIM_VERSION=${FMUSIM_VERSION} LIBXML_STATIC)
 endif ()
 
 if (WIN32)
diff --git a/fmusim/fmusim.c b/fmusim/fmusim.c
index e7fd8f58..7ee4b548 100644
--- a/fmusim/fmusim.c
+++ b/fmusim/fmusim.c
@@ -37,6 +37,7 @@
 
 #define PROGNAME "fmusim"
 
+
 #define CALL(f) do { status = f; if (status > FMIOK) goto TERMINATE; } while (0)
 
 
@@ -101,10 +102,11 @@ static void logFunctionCall(FMIInstance* instance, FMIStatus status, const char*
 
 void printUsage() {
     printf(
-        "Usage: " PROGNAME " [OPTION]... [FMU]\n"
+        "Usage: " PROGNAME " [OPTION]... [FMU]\n\n"
         "Simulate a Functional Mock-up Unit and write the output to result.csv.\n"
         "\n"
         "  --help                           display this help and exit\n"
+        "  --version                        display the program version\n"
         "  --interface-type [me|cs]         the interface type to use\n"
         "  --tolerance [TOLERANCE]          relative tolerance\n"
         "  --start-time [VALUE]             start time\n"
@@ -253,7 +255,13 @@ int main(int argc, const char* argv[]) {
         goto TERMINATE;
     } else if (argc == 2 && !strcmp(argv[1], "--help")) {
         printUsage();
-        status = FMIError;
+        goto TERMINATE;
+    } else if (argc == 2 && !strcmp(argv[1], "--version")) {
+        printf(PROGNAME " "
+#ifdef FMUSIM_VERSION
+            FMUSIM_VERSION
+#endif
+            " (" FMI_PLATFORM_TUPLE ")\n");
         goto TERMINATE;
     }